TCGHeart works in euros and looks at the European market. For every card you see the lowest price in the country you set, in the condition you own it in, and what that price has done since yesterday.
A card does not have one price. It has a price in the Netherlands, a different one in Germany, and within each country a different price per condition.
You set your country and your default condition, and every price in the app follows it. A copy you added as Good is priced as Good, not as Near Mint.
For some cards there is no listing in your country in your condition. Rather than quietly reaching for the most expensive price, the app steps to the nearest better condition and says explicitly which price you are looking at.
So you always know whether the figure on screen is exactly your copy, or the closest available approximation.
A PSA 10 is a different product from the same card raw. Graded copies are therefore not valued at the single-card price but from sales data for slabbed cards in that exact grade.
If there is no sales data for your combination of grader and grade, the app says so and falls back to the raw price. You can then set your own value.
Your collection value is recorded daily, so you get a chart that reaches further back than today. You can zoom in on a single portfolio, or leave portfolios out of the total.
Alongside value the app tracks what you paid, so you see what your collection has done and not only what it is.
Euros. The app is built for the European market and shows the lowest price in the country you set.
Yes. Per copy you can enter your own price, which is then used for that copy. The app marks those copies so you can later tell which figure came from you and which from the market.
From sales data for slabbed cards in that exact combination of grader and grade, for example PSA 10 or BGS 9.5. A BGS 10 Black Label is handled separately from a plain BGS 10, because in practice those are very different amounts.
Yes. Elite Trainer Boxes, booster boxes, bundles and tins have their own price and price history, just like single cards.
Daily. Every card also shows the difference against yesterday's price.